Nanoestructura de perovskita doble La2NiMnO6 obtenido por ruta de citrato para supercapacitores
; Tasca, Julia Elena
; Acosta, Gerardo Gabriel
; Lavat, Araceli Elisabet Otros responsables
Fecha
07/2018
Editorial
Universidade Federal do Rio de Janeiro
Revista
Matéria
Título del libro
Nombre del evento
Fecha del evento
Institución organizadora
ISSN
1517-7076
eISSN
ISBN
Idioma
Español
Tipo del evento
Clasificación temática
Palabras clave
Resumen
En este trabajo se presenta el estudio de la perovskita doble La2NiMnO6 como material de electrodo para supercapacitores. El óxido mixto fue preparado por ruta de precursores citrato (CIT). La muestra fue calcinada 4 horas a 800 ºC. El material fue caracterizado por DRXP, espectroscopía FTIR y microscopía SEM.
El comportamiento capacitivo del material fue evaluado mediante voltamperometría cíclica y mediciones galvanostáticas de carga/descarga en medio alcalino y ácido. Los perfiles I/V fueron registrados variando las velocidades de barrido de 10 a 100 mV/s. Las curvas galvanostáticas de carga/descarga se registraron a diferentes densidades de corriente, con valores entre 3 y 17 A/g. Los valores más altos de capacitancia fueron obtenidos en medio alcalino. Se encontraron valores de capacitancia específica de 1681 F/g a una densidad de corriente de 3 A/g, potencia y energía específica de 2903 W/kg y 378 Wh/kg, respectivamente. Mientras que en medio ácido los valores fueron de 492 F/g, 3225 W/kg, 137 Wh/kg de capacitancia, potencia y energía específica, respectivamente. Estos resultados obtenidos permiten considerar a las perovskitas dobles como potenciales materiales de electrodo para supercapacitores.
In this paper, the study of double perovskite La2NiMnO6 as electrode material for supercapacitors is presented. The mixed oxide was prepared by citrate precursor route (CIT). The sample was calcined for 4 hours at 800 °C. The material was characterized by PXRD, SEM and FTIR spectroscopy.Cyclic voltammetry and galvanostatic charge/discharge measurements were used to study the capacitive behavior of the nanomaterial in alkaline and acid solutions. I/V profiles were obtained at varying the scan rates from 10 to 100 mV/s. The galvanostatic charge/discharge curves were recorded at different current density values in the 3-17 A/g range. The higher capacitance values were obtained in alkaline medium. Thus, a specific capacitance of 1681 F/g at a current density of 3 A/g, and a power and an energy specific of 2903 W/kg and 378 Wh/kg, were obtained in KOH. While in acid solution these values were 492 F/g, 3225 W/kg and 137 Wh/kg, respectively. These promising results promote the use of the double perovskites for electrode materials in supercapacitors.
In this paper, the study of double perovskite La2NiMnO6 as electrode material for supercapacitors is presented. The mixed oxide was prepared by citrate precursor route (CIT). The sample was calcined for 4 hours at 800 °C. The material was characterized by PXRD, SEM and FTIR spectroscopy.Cyclic voltammetry and galvanostatic charge/discharge measurements were used to study the capacitive behavior of the nanomaterial in alkaline and acid solutions. I/V profiles were obtained at varying the scan rates from 10 to 100 mV/s. The galvanostatic charge/discharge curves were recorded at different current density values in the 3-17 A/g range. The higher capacitance values were obtained in alkaline medium. Thus, a specific capacitance of 1681 F/g at a current density of 3 A/g, and a power and an energy specific of 2903 W/kg and 378 Wh/kg, were obtained in KOH. While in acid solution these values were 492 F/g, 3225 W/kg and 137 Wh/kg, respectively. These promising results promote the use of the double perovskites for electrode materials in supercapacitors.
Colecciones
Aprobación
Revisión
Complementado por
Referenciado por
Licencia Creative Commons
Excepto donde se indique lo contrario, la licencia de este ítem se describe como by-nc-sa
